EP0463217B1 - Bürstenherstellungsmaschine - Google Patents
Bürstenherstellungsmaschine Download PDFInfo
- Publication number
- EP0463217B1 EP0463217B1 EP90112340A EP90112340A EP0463217B1 EP 0463217 B1 EP0463217 B1 EP 0463217B1 EP 90112340 A EP90112340 A EP 90112340A EP 90112340 A EP90112340 A EP 90112340A EP 0463217 B1 EP0463217 B1 EP 0463217B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- plate member
- plate
- brush
- making machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14385—Coating a portion of a bundle of inserts, e.g. making brushes
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D3/00—Preparing, i.e. Manufacturing brush bodies
- A46D3/005—Preparing, i.e. Manufacturing brush bodies by moulding or casting a body around bristles or tufts of bristles
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D3/00—Preparing, i.e. Manufacturing brush bodies
- A46D3/08—Parts of brush-making machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into the mould
Definitions
- the present invention relates to a brush making machine and more particularly to a machine for making tooth brushes.
- EP-A-142 885 when considered in connection with the manufacture of tooth brushes as indicated in this document, teaches a machine comprising a mold for injection-molding brush bodies having tufts of bristles embedded in the molding material; this mold comprises:
- EP-A-0 142 885 discloses a machine comprising a disk-shaped index plate mounted to rotate around a central axis so that a pattern of bristle receiving holes provided in the plate can be indexed from one station to the next during the steps of the brush manufacturing process.
- a bristling station bristle tufts are inserted in the bristle receiving holes.
- the index plate is pressed against another mold part which can itself be formed by two separable molds members to facilitate the release of the side wall of the trough-like brush structure.
- the complete mold includes the portion of the index plate containing the bristles, which forms one side of a mold cavity, and the other mold part which forms the remainder of the mold cavity.
- a plurality of bristle receiving hole patterns can be provided in the index plate, each moving to a different station as the plate is rotated.
- This trough-like brush structure is molded without any extension, as for example a handle or the like.
- the invention relates to a machine of the kind mentioned at the beginning, characterized by the features of the characterizing part of claim 1.
- the machine can also comprise a heating plate located in facing relationship with the molding surface of the plate member when the latter is in its tuft loading position.
- the fusing of the tufts into anchoring heads is effected simultaneously with the injection molding of a brush body, without loss of time.
- the heating plate is stationary or need be moved only over a short distance, which is advantageous as regards both the structure of the heating plate and its connections to a power source.
- the carrier member is movable both in rotation about an axis substantially perpendicular to the longitudinal axis of the brush body and in translation along said axis.
- the movements of the carrier member to displace the plate members from their mold closing position to their tuft loading position can therefore be achieved very simply, inasmuch as the carrier on the plate members can be of small size and low weight.
- the machine for making tooth brushes comprises a first mold member 10 preferably mounted stationary onto a machine frame not shown on the drawing, second mold members and a third mold member 12, movable towards and away from the first mold member 10 as illustrated by the double arrow 14.
- the first mold member 10 is provided with a mold cavity 16 which corresponds to a first portion of the brush body to be molded; more specifically, the mold cavity 16 comprises three portions, a handle back portion 16a which corresponds to the back side of the handle of the brush body, a head back portion 16b which corresponds to the back side of the head of the brush body, i.e.: opposite to the tufts of bristles, and a neck back portion 16c, located intermediate to and narrower than the handle back portion and the head back portion, which corresponds to the back side of the neck of the brush body.
- the third mold member 12 is provided with a mold cavity 18 which corresponds to a second portion of the brush body to be molded; more specifically, the mold cavity 18 comprises two portions: a handle front portion 18a which corresponds to the front side of the handle of the brush body and a neck front portion 18c, also narrower than the handle from portion 18a, which corresponds to the front side of the neck of the brush body.
- the machine further comprises a carrier member 20 which mounts two plate members 22, 22' similar to each other and forming said second mold members.
- Each plate member has a molding surface 24, 24' and is provided with throughholes 26, 26' for receiving tufts 28 of bristles which are dispensed by a tuft loader 30 located at a position spaced from the first and the third mold members 10, 12.
- the molding surface 24 (24') of plate member 22 (22') delimits a mold cavity 118b which corresponds to the front side of the head of the brush body and the tufts 28 of bristles are loaded by the tuft loader 30 in such a manner that the tufts protrude from the molding surface 24 (24') to ensure the fastening of the tufts in the material of the body as it will be later explained.
- the carrier 20 is movable both in rotation about a center axis XX perpendicular to and offset from the longitudinal axis YY of the brush body as indicated by the double arrow 31, and in translation along this axis XX as indicated by the double arrow 32, such that the carrier can move the two plate members 22, 22' in order to bring plate member 22 to its mold closing position, in which its molding surface 24 closes the head back portion 16b of the mold cavity 16 of the first mold member 10, as illustrated in Figure 2, and to bring simultaneously the other plate member 22' in its tuft loading position in front of the tuft loader 30.
- the third mold member 12 is provided with a recess 34 which is complementary to the outer shape of the plate member 22 (22') such that when the third mold member 12 is located against the first mold member 10 in their mold closing position, as better seen in Figure 2, the plate member 22 (22') is accommodated in this recess 34 and the mold cavity 118b of plate member 22 and the mold cavity 18 of the third mold member communicate with each other substantially at the neck portion of the brush body and form a common continuous mold cavity.
- a brush body can be injection-molded in the molding chamber 19, via injection passages not shown in the drawings, as it will be readily apparent to a man skilled in the art.
- the ends of the tufts which protrude from the molding surface 24 of plate member 22 are embedded in the injected molding material, and are thereby securely held in place.
- both mold members are provided with cooling ducts, not shown in the drawings, through which a coolant fluid is fed in order to cool the mold members 10, 12 and the molding material injected therein until the latter reaches a hardened state, whereupon the two mold members 10, 12 can be separated and the molded brush body can be ejected.
- the other plate member 22' is loaded with tufts of bristles by means of the tuft loader 30. More precisely, the tuft loader is brought into engagement with this plate member 22' such that the tuft dispensing orifices of the tuft loader register with the throughholes 26' of the plate member, the tuft loader is then actuated to dispense tufts 28 of a predetermined length into the throughholes such that the tufts protrude from the oppositely located molding surface 24' of the plate member 22'. The tuft loader 30 is then displaced away from the plate member 22' and the tufts 28 are cut by a cutter 36 slidably mounted between the plate member and the tuft loader.
- the ends of the tufts 28 protruding from the molding surface 24' of the plate member 22' are fused together into an anchoring head for better securing of the tufts into the injected body material.
- the heating plate 38 is movable over a short distance towards the plate member 22' in order to come into engagement with the tuft ends and cause them to fuse, and away from the plate member 22' once the tuft ends have been fused.
- the heating plate 38 is provided at its surface with a plurality of small molding depressions 42 in front of the tuft ends in order to form rounded heads onto the tufts 28, whereby the heating plate 38 can also be regarded as a shaping tool.
- the heating plate 38 is generally flat and the plate member 22 (22') is comprised of two portions 22a, 22b (22a', 22b') arranged in parallel relationship to each other.
- a first portion 22b (22b') is solid with the carrier plate 20 and is provided with the tuft receiving throughholes 26 (26'), and a second portion 22a (22a') is movable in relation to the first portion 22b (22b').
- the heating plate 38 can be provided with a raised boss for penetrating the molding cavity 118b (118b') of the plate member in order to come into engagement with the tuft ends.
- This variant will be readily apparent to those with ordinary skill in the art and has therefore not been illustrated.
- carrier plate 20 and the plate members 22, 22' have a reduced size and a low weight and their displacement entails relatively low inertia forces.
- Another advantage of the inventions resides in the fact that the mold members 10, 12, which are typically provided with cooling passages for a coolant fluid, move only over a limited distance. Their connections to a coolant fluid supply circuit, not shown, can be easily achieved by short flexible fittings.
- the first mold member 10 has been described as stationary, it will be understood that the invention also encompasses embodiments in which both the first and the third mold members 10, 12 are movable.
- the plate members 22, 22' are of relatively small size and snugly accommodated in the complementary recess 34 of the third mold member 12, there is no need to provide coolant passages in the plate members 22, 22'. Their cooling is ensured by heat transfer contact with the third mold member 12 and subsidiarily with the first mold member 10.
- the connections of the heating plate 38 to a power supply source are also simplified since its displacements are of limited amplitude.
- the carrier plate 20 can be so mounted as to be slidably movable instead of being rotatable. The displacement of the carrier will then be effected in transverse direction with respect to the displacement direction XX of the first and the third mold members 10, 12, instead of being rotatable as hereinbefore described.
- the mold members 10, 12 can be provided with more than one cavity (16, 18) (multi-cavity mold) instead of just one as shown in Fig. 1
- the carrier plate 20 will then carry a corresponding number of plate members 22 in order to match with each of the cavities (16, 18).
- a corresponding number of tuft loaders (30) is provided to dispense tufts of bristles to each of the plate members 22 or one tuft loader (30) serves the plate members 22 sequentially one after the other.
- the number of plate members carried by the carrier member 20 can be higher than two as described heretofore.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Brushes (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Claims (8)
- Maschine zur Bürstenherstellung, mit einer Gußform (10, 12, 22) zum Spritzgießen von Zahnbürstenkörpern mit in das Gußmaterial eingebetteten Büscheln aus Borsten (28), wobei die Gußform enthält:
ein erstes Gußformteil (10) mit einem Gußhohlraum (16), der einem ersten Abschnitt des zu gießenden Bürstenkörpers entspricht; und
ein Plattenteil (22), das ein zweites Gußformteil bildet, das mit einer Gußfläche (24) und mit Löchern (26) zur derartigen Aufnahme von Büscheln aus Borsten (28) versehen ist, daß die Büschel (28) von der Gußfläche (24) hervorstehen, wobei das Plattenteil (22) dafür vorgesehen ist, einen Abschnitt des Gußhohlraums (16) des ersten Gußformteils (10) zu schließen;
wobei das Plattenteil (22) zwischen einer die Gußform schließenden Stellung und einer von der die Gußform schließenden Stellung beabstandeten Büschelaufnahmestellung bewegt werden kann; dadurch gekennzeichnet, daß:a) die Gußform (10, 12, 22) zusätzlich enthält:
ein drittes Gußformteil (12) mit einem Gußhohlraum (18), der einem zweiten Abschnitt des zu gießenden Bürstenkörpers entspricht;b) das erste und das dritte Gußformteil (10, 12) relativ zueinander zwischen einer die Gußform schließenden Stellung, in welcher ihre Hohlräume (16, 18) zusammen eine Gußkammer (19) abgrenzen, und einer die Gußform öffnenden Stellung bewegbar sind;c) die Gußfläche (24) des Plattenteils (22) einen Gußhohlraum (118b) abgrenzt, der einem ersten Kopfabschnitt des zu gießenden Bürstenkörpers entspricht, wobei der verbleibende Kopfabschnitt des Bürstenkörpers von einem Abschnitt (16b) des Gußhohlraums (16) des ersten Gußformteils (10) abgegrenzt ist;d) das Plattenteil (22) eine Außengestalt aufweist, die zu einer in dem dritten Gußformteil (12) gebildeten Ausnehmung (34) komplementär ist, wobei die Gußhohlräume (118b, 18) des Plattenteils (22) und des dritten Gußformteils (12) miteinander im wesentlichen über einen Halsabschnitt des Bürstenkörpers in Verbindung stehen, wenn sich das Plattenteil (22) und das dritte Gußformteil (12) in ihren die Gußform schließenden Stellungen befinden, so daß ein gemeinsamer durchgehender Gußhohlraum gebildet wird, der dem Bürstenkörper entspricht und den Kopf und einen weiteren Teil mit dem Halsabschnitt dazwischen beinhaltet; unde) das Plattenteil (22) an einem Träger (20) angebracht ist, an dem wenigstens ein weiteres gleichartiges Plattenteil (22') angebracht ist, wobei der Träger (20) so bewegbar ist, daß er eines der Plattenteile (22) in seine die Gußform verschließende Stellung und gleichzeitig das andere Plattenteil (22') in seine Borstenaufnahmestellung bewegt, und umgekehrt. - Maschine zur Bürstenherstellung nach Anspruch 1, dadurch gekennzeichnet, daß sie außerdem eine Heizplatte (38) aufweist, die der Gußfläche (24) des Plattenteils (22) gegenüberliegt, wenn letztere sich in der Büschelaufnahme-Stellung befindet.
- Maschine zur Bürstenherstellung nach Anspruch 2, dadurch gekennzeichnet, daß die Heizplatte eine geheizte Formplatte (38) ist, die mit mehreren Gußvertiefungen (42) versehen ist, um auf den Enden der von der Gußfläche (24) des Plattenteils (22) hervorstehenden Büschel (28) verrundete Köpfe zu bilden.
- Maschine zur Bürstenherstellung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Träger (20) bewegbar ist sowohl in einer Drehbewegung um eine zu der Längsachse (YY) des Bürstenkörpers im wesentlichen senkrechte Achse (XX) als auch in einer Translationsbewegung entlang dieser Achse (XX).
- Maschine zur Bürstenherstellung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Träger (20) bezüglich der Richtung der Verstellung des ersten und des dritten Gußformteils (10, 12) in einer Querrichtung bewegbar ist.
- Maschine zur Bürstenherstellung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Plattenteil (22) zwei Abschnitte aufweist, nämlich einen fest mit der Trägerplatte (20) verbundenen ersten Abschnitt (22b) sowie einen an dem Träger (20) angebrachten zweiten Abschnitt (22a), wobei die Gußfläche (24) auf dem Plattenteil (22) von dem ersten Abschnitt (22b) bestimmt ist.
- Maschine zur Bürstenherstellung nach Anspruch 6, dadurch gekennzeichnet, daß der zweite Abschnitt (22a) des Plattenteils bewegbar an dem Träger (20) angebracht ist.
- Maschine zur Bürstenherstellung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das erste Gußformteil (10) feststehend ist.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP90112340A EP0463217B1 (de) | 1990-06-28 | 1990-06-28 | Bürstenherstellungsmaschine |
DE69018070T DE69018070T2 (de) | 1990-06-28 | 1990-06-28 | Bürstenherstellungsmaschine. |
ES90112340T ES2071703T3 (es) | 1990-06-28 | 1990-06-28 | Maquina para fabricar cepillos. |
US07/708,369 US5143424A (en) | 1990-06-28 | 1991-05-31 | Brush making machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP90112340A EP0463217B1 (de) | 1990-06-28 | 1990-06-28 | Bürstenherstellungsmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0463217A1 EP0463217A1 (de) | 1992-01-02 |
EP0463217B1 true EP0463217B1 (de) | 1995-03-22 |
Family
ID=8204151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90112340A Expired - Lifetime EP0463217B1 (de) | 1990-06-28 | 1990-06-28 | Bürstenherstellungsmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5143424A (de) |
EP (1) | EP0463217B1 (de) |
DE (1) | DE69018070T2 (de) |
ES (1) | ES2071703T3 (de) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9116871U1 (de) * | 1991-08-21 | 1994-04-14 | Fa. Anton Zahoransky, 79674 Todtnau | Bürstenherstellungsmaschine mit einer Spritzgußform |
US5352025A (en) * | 1993-03-22 | 1994-10-04 | Jason Huang | Method for manufacturing a hairbrush and the product thereof |
DE4311186A1 (de) * | 1993-04-06 | 1994-10-13 | Schiffer Fa M & C | Verfahren und Vorrichtung zur Herstellung von Bürstenwaren |
US5350219A (en) * | 1993-07-26 | 1994-09-27 | Acumen Co., Ltd | Toothbrush without metal gasket |
GB2287901B (en) * | 1994-03-29 | 1998-05-06 | Boucherie Nv G B | A brush making machine |
GB2288564B (en) * | 1994-04-19 | 1998-09-23 | Boucherie Nv G B | A molding machine for injection molding of tooth brushes |
DE4415886A1 (de) * | 1994-05-05 | 1995-11-09 | Coronet Werke Gmbh | Verfahren zur Herstellung von Borstenwaren im Wege des Spritzgießens |
GB2289236B (en) * | 1994-05-09 | 1997-08-06 | Boucherie Nv G B | A brush making machine |
DE19515294B4 (de) * | 1995-04-26 | 2004-04-15 | Zahoransky Formenbau Gmbh | Bürstenherstellungsmaschine |
BE1009384A3 (nl) * | 1995-05-10 | 1997-03-04 | Boucherie Nv G B | Werkwijze en inrichting voor het vervaardigen van borstellichamen. |
US5927819A (en) * | 1997-02-28 | 1999-07-27 | Gillette Canada Inc. | Method and device for trimming and end-rounding bristles |
GB2330791B (en) * | 1997-10-30 | 2002-05-08 | Boucherie Nv G B | Method of molding toothbrushes and apparatus for performing the method |
US6041468A (en) * | 1998-03-12 | 2000-03-28 | Colgate-Palmolive Company | Prophy toothbrush |
US6679696B1 (en) * | 1998-04-28 | 2004-01-20 | Gillette Canada Company | Apparatus for substantially simultaneously forming multiple articles having different properties |
DE69912941T2 (de) | 1998-04-28 | 2004-09-02 | Gillette Canada Co., Mississauga | Vorrichtung zum hauptsächlich gleichzeitigen formen von mehreren gegenständen mit verschiedenen eigenschaften |
DE19949851C2 (de) | 1999-10-15 | 2001-09-13 | Hekuma Herbst Maschb Gmbh | Kunststoff-Spritzgießmaschine, Handlingsystem sowie Verfahren zum Überführen eines Gegenstandes |
US6523907B1 (en) * | 2000-02-01 | 2003-02-25 | Moll Industries, Inc. | Apparatus and method for producing brushware by injection molding |
US6588851B1 (en) | 2000-05-26 | 2003-07-08 | Kenan Bible | Clamp for retaining bristle bundles of various sizes |
US6354911B1 (en) | 2000-05-26 | 2002-03-12 | Moll Industries, Inc. | Method and apparatus for end-rounding bristles |
GB0020021D0 (en) * | 2000-08-16 | 2000-10-04 | Smithkline Beecham Gmbh & Co | Process |
US6893100B1 (en) | 2000-09-19 | 2005-05-17 | Gillett Canada Company | Methods and apparatus for automated brush assembly |
US6578929B2 (en) | 2001-05-23 | 2003-06-17 | The Gillette Company | Tufting oral brushes |
DE10219516A1 (de) * | 2002-04-30 | 2003-11-20 | Braun Gmbh | Verfahren zum Herstellen einer Zahnbürste mit geteiltem Bürstenkopf |
US7121937B2 (en) * | 2003-03-17 | 2006-10-17 | 3M Innovative Properties Company | Abrasive brush elements and segments |
FR2857568B1 (fr) * | 2003-07-18 | 2006-12-08 | Oreal | Dispositif applicateur moule, moule et procede de moulage d'un tel dispositf, et kit comportant ledit dispositif |
US8117725B2 (en) * | 2008-10-31 | 2012-02-21 | The Gillette Company | Method of manufacturing a plurality of molded components |
TWI539911B (zh) * | 2013-11-29 | 2016-07-01 | Cheng Fang | Integral molded seamless brush and its manufacturing method |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2317110A (en) * | 1938-08-04 | 1943-04-20 | Du Pont | Method of making brushes |
US2655409A (en) * | 1947-07-05 | 1953-10-13 | Columbia Protektosite Co Inc | Art of and apparatus for molding brushes |
US3026146A (en) * | 1959-12-24 | 1962-03-20 | Szabo Gyozo | Method of and apparatus for the manufacture of brushes |
FR1397286A (fr) * | 1963-03-02 | 1965-04-30 | Triulzi S A S A | Dispositif à appliquer aux presses à injection et à moulage sous pression pour la manipulation d'objets lourds et encombrants |
FR2299137A1 (fr) * | 1974-06-04 | 1976-08-27 | Prus Henryk | Machine semi-automatique destinée au surmoulage ou à l'enrobage de pièces par des matières plastiques |
EP0142885B1 (de) * | 1983-11-16 | 1991-02-06 | Anchor Advanced Products, Inc. | Verfahren zur Herstellung von Bürsten mit Selbstbefestigung der Borsten sowie nach diesem Verfahren hergestellte Bürsten |
EP0195134B1 (de) * | 1985-03-14 | 1989-08-02 | G.B. Boucherie, N.V. | Halter für Bürstenkörperträger bei Bürstenherstellungsmaschinen |
DE3511528C1 (de) * | 1985-03-29 | 1991-01-03 | Coronet - Werke Heinrich Schlerf Gmbh, 6948 Wald-Michelbach | Verfahren zur Herstellung von Borstenwaren |
-
1990
- 1990-06-28 DE DE69018070T patent/DE69018070T2/de not_active Expired - Lifetime
- 1990-06-28 ES ES90112340T patent/ES2071703T3/es not_active Expired - Lifetime
- 1990-06-28 EP EP90112340A patent/EP0463217B1/de not_active Expired - Lifetime
-
1991
- 1991-05-31 US US07/708,369 patent/US5143424A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69018070T2 (de) | 1995-08-10 |
DE69018070D1 (de) | 1995-04-27 |
EP0463217A1 (de) | 1992-01-02 |
ES2071703T3 (es) | 1995-07-01 |
US5143424A (en) | 1992-09-01 |
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